如图是6个小正方体搭成的，如果从上面观察，看到的形状是（　　）

按时间先后顺序排列正确的是（    ）

①罗马帝国   ②罗马共和国   ③东罗马帝国的灭亡   ④西罗马帝国的灭亡

Good table manners

    We are going to hold a talk on good table manner. The purpose of the talk is to teach students

隋朝开通大运河的根本目的（    ）

- How many teachers are there in your school?

- ______ them ______ over one hundred.